refactor: R_VERSION syntax

.crow/update-package-index-alpine-322-amd64.yaml

@@ -42,12 +42,12 @@ steps:
     commands:
       - git clone -q https://pat-s:$$REPO_RO_TOKEN@git.devxy.io/devxy/build-cran-binaries.git .
       - rm -rf /mnt/cache/packages/*
-      - /opt/R/${R_VERSION}/bin/R -q -e 'pak::pak("git::https://codefloe.com/rpkgs/bincraft.git")'
-      - /opt/R/${R_VERSION}/bin/R -q -e 'pak::pak("pat-s/cranlike@s3")'
-      - /opt/R/${R_VERSION}/bin/R -q -e 'pak::pak("pat-s/desc@description-from-remote")'
-      - /opt/R/${R_VERSION}/bin/R -q -e 'packageVersion("bincraft")'
+      - /opt/R/$R_VERSION/bin/R -q -e 'pak::pak("git::https://codefloe.com/rpkgs/bincraft.git")'
+      - /opt/R/$R_VERSION/bin/R -q -e 'pak::pak("pat-s/cranlike@s3")'
+      - /opt/R/$R_VERSION/bin/R -q -e 'pak::pak("pat-s/desc@description-from-remote")'
+      - /opt/R/$R_VERSION/bin/R -q -e 'packageVersion("bincraft")'
       # - cd /mnt/cache/packages
-      - /opt/R/${R_VERSION}/bin/R -q -e 'options(crayon.enabled = TRUE); library(bincraft); future::plan("multisession", workers = 4); library(progressr); handlers(global = TRUE); handlers("progress"); upload_package_index(codename = "alpine322", s3_endpoint = "https://s3.eu-central-003.backblazeb2.com", s3_region = "eu-central-003", s3_bucket = "devxy-rpkgs-binaries", s3_access_key_id = Sys.getenv("B2_S3_ACCESS_KEY"), s3_secret_access_key = Sys.getenv("B2_S3_SECRET_KEY"))'
+      - /opt/R/$R_VERSION/bin/R -q -e 'options(crayon.enabled = TRUE); library(bincraft); future::plan("multisession", workers = 4); library(progressr); handlers(global = TRUE); handlers("progress"); upload_package_index(codename = "alpine322", s3_endpoint = "https://s3.eu-central-003.backblazeb2.com", s3_region = "eu-central-003", s3_bucket = "devxy-rpkgs-binaries", s3_access_key_id = Sys.getenv("B2_S3_ACCESS_KEY"), s3_secret_access_key = Sys.getenv("B2_S3_SECRET_KEY"))'
     backend_options:
       kubernetes:
         resources: